SOLUTION: A certain type of lily spreads to double the area it covers every year. Ten years after being planted in our lake these water lilies cover a quarter of its surface. How many more y
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Question 974465: A certain type of lily spreads to double the area it covers every year. Ten years after being planted in our lake these water lilies cover a quarter of its surface. How many more years will it be before they cover the entire surface of the lake? Please help adapt ;)
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
Here, let q=1, for the whole lake surface.
A is the fraction of the lake covered in time t years.
The ten year change should not matter if the first sentence is what happens.
What is t when A=1/4 ?
What is t when A=1 ?
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